Door assembly for microwave heating apparatus

Abstract

A high frequency heating apparatus has an oven-defining structure having an access opening in communication with a heating chamber defined therein, and a hingedly supported metallic door for selectively opening and closing over the access opening. The door has its peripheral area formed with a groove open towards the heating chamber. The bottom of the groove is situated frontwardly of the door with respect to the apparatus. An outerside wall extending from the groove is formed with a plurality of cutouts and a plurality of generally rectangular openings alternating with the cutouts. Each of the cutouts and each of the rectangular openings have one edge positioned on one side of a setup portion, protruding from the bottom of the groove, adjacent the oven-defining structure. The outer wall has a portion bent to protrude transversely into the groove to define a partitioning wall.

What is claimed is: 
     
       1. A heating apparatus employing high frequency electromagnetic wave energy, said apparatus comprising: a heating chamber in which the high frequency electromagnetic wave energy is employed for heating, said heating chamber having an access opening and a front panel extending around said access opening;   a door hinged to said heating chamber for opening and closing over said access opening, said door having a peripheral portion surrounding said access opening when said door is closed,   said peripheral portion defining a groove open towards the front panel of said heating chamber, the peripheral portion of the door comprising an outer peripheral wall defining a side of the groove, the outer peripheral wall having a plurality of projections extending toward the front panel and a plurality of openings therein, and said peripheral portion also comprising a first covering member comprised of synthetic resin extending over said projections for covering said groove, said first covering member having a plurality of engagement portions extending in said openings in said outer peripheral wall and also having an extending part,   said door also comprising a second covering member defining the front face of the door, said second covering member having an extension part engaging the extending part of said first covering member for securing said first covering member to the door.